10. Fast Silicon anodes from Enevate

Can silicon anodes provide BOTH higher capacity AND faster rates?
Free standing, 5 micron, flexible, strong anode with >70% silicon from Enevate


Patent link

Enevate website poster

Enevate website

There is a lot of talk on the subject of fast charging in the electric vehicle world. In principle, you cannot have both high energy density AND fast charging built into the same battery. There are many reasons for this, however, the graphite anode is the main block to fast charging. Currently “power” cells with graphite anodes can charge as fast as 75% in 15 minutes while “energy” cells require >1.5 hours. Future anodes such as silicon may bring larger capacities AS WELL AS faster rates of charging. Enevate discloses how in this patent. Listen to my podcast to learn more.

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7. Cathode chit chat. NMC what?

My guest, Rajesh Mekkat discusses commercial cathodes for lithium ion batteries

Scanning electron micrograph of a NCM622 cathode cross section

Cathodes are positive electrodes in batteries and are responsible for the high voltage. In this podcast I discuss with Rajesh Mekkat the intricacies of commercial lithium ion cathodes preferred by electric automakers such as NCM, LMO and lithium rich cathodes. Rajesh has been a cathode research engineer for Renault-Nissan in various leadership positions for close to 10 years. Recently, he continues his cathode work in China, at the largest SUV OEM in the country: Great Wall Motor. You can view his LinkedIn profile here. Many safety and energy density features are governed by the cathode.

Today’s guest and cathode specialist: Rajesh Mekkat

6. Lithium metal anodes (fast as snails?!)

Faster Li plating through LLZO solid electrolytes. Latest from the Sakamoto group.
LLZO solid electrolyte pelltet. Easy to work with in small areas. But how can large, thin sheets be made for commercial applications?

Paper link: https://www.sciencedirect.com/science/article/abs/pii/S0378775318306529

Sakamoto group page: https://sakamoto.engin.umich.edu/people/

News article: https://news.umich.edu/battery-breakthrough-doubling-performance-with-lithium-metal-that-doesnt-catch-fire/

Plating lithium metal anodes through inorganic solid electrolytes is challenging and slow due to proliferation of dendrites along the grain boundary where ionic conductivity is higher. Sakamoto’s group shares evidence of rate improvements without dendritic growth with LLZO solid electrolytes. 

4. Sion Power’s better Li-metal anodes by force!

 

Link to patent US20180269520

Link to Sion Power’s Li-metal anode commercial cell

Sion Power has been a leader in batteries with lithium metal for more than 20 years. Traditionally championing lithium-sulfur batteries, it has recently expanded into high energy density batteries with lithium metal and traditional high voltage cathodes such as NMC622/811, etc. It’s Licerion product offers a 20Ah pouch cell,  500 Wh/kg, 1000 Wh/l with an impressive EOL of 80% after 500 cycles at C/3. In this podcast i discuss its 2018 patent on the importance of (anisotropic) pressure applied to cells with lithium metal anodes. Enjoy!

3. 3D lithium metal anode from Prologium

 

Patent

Prologium website

A lithium metal electrode and its related lithium metal battery is disclosed in the present invention. The lithium metal electrode comprises a current collector, a lithium metal layer, an insulation frame, a porous electrical insulation layer and an ionic diffusion layer. The current collector has at least a well. The lithium metal layer is disposed on the bottom surface of the well. The insulation frame is disposed alone the opening of the well. The insulation frame extends radially outward the opening to cover a top surface of the current collector partially and extends vertically toward the inner sidewall of the well. The lithium dendrites will mostly plate in the well and will not plate upwards due to the inhibition layer. Hence, the lithium dendrites will not penetrate through the electrical insulator so that the safety of the lithium metal battery can be improved greatly.